A parallel-to-serial converter multiplexes parallel input data into a serial output data. This converter includes a multiplier for multiplying an input clock corresponding to a parallel input data, a divider for dividing the multiplied clock, and a waveform shaping circuit for shaping a serial output...http://www.google.com/patents/US4965797?utm_source=gb-gplus-sharePatent US4965797 - Parallel-to-serial converter
